<;P>;PROBLEM TO BE SOLVED: To obtain a preservative having excellent preservation effect on Burkholderia cepacia to cause a problem in preparation for transtracheal administration, a nasal drop and an inhalant containing the preservative. <;P>;SOLUTION: The preservative for Burkholderia cepacia comprises a quaternary ammonium salt and a p-oxybenzoic acid ester as active ingredients. The nasal drop or the inhalant comprises a quaternary ammonium salt and a p-oxybenzoic acid ester as the preservative for Burkholderia cepacia. <;P>;COPYRIGHT: (C)2007,JPO&INPIT